"""
    求矩形相交的面积
    box   = [gx1, gy1, gx2, gy2]
    boxes = [cx1, cy1, cx2, cy2]

    box   = np.array([2, 2, 20, 25])
    boxes = np.array([15, 12, 25, 21])
"""
import numpy as np

box = np.array([2, 2, 20, 25])
boxes = np.array([15, 12, 25, 21])
